WIP Singleton resource
Fix type on ResourceTypeError.
Release 0.23.1
Use hacky delegator also delegating class and instance checks to provide a dynamic class method access.
Release 0.23.2
Use buckler shield instead of own for rubydoc.
Add '1' to allowed boolean TRUE_VALUES
Acfs boolean attribute specs
Fix typhoeus version.

Due to new mime-types major typhoeus will be auto-resolved to 0.3.3 without version constraint.
Try travis rbx.
Require rubysl on rbx
Add rbx specific gems
Add specs for converting stub params to stringified hash.
Fix problem with list stub without parameter constraint.
Fix problems with type inheritance in stubs.
Release 0.24.0
Try .1 prefixed travis version release.
Add option for allowing blank values
Dup operation params and data to avoid in-place changes.

Operation didn't dup params and data that leads to potential in-places changes as hashes are reused in some find multiple scenarios.
Add support for singletons to Acfs

Usage:
  Single.find
    # sends GET request to http://service:port/single

  my_single.save
    # if my_single is a new object:
    #   sends POST request to http://service:port/single
    # else if my_single has been requested before:
    # sends PUT request to http://service:port/single

  my_single.delete
    # sends DELETE request to http://service:port/single

SingletonResources do not support the Resource method :all, since
always only a single instance of the resource is being returned